<template>
  <view>
    <!-- 自定义组件 -->
    <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
    <!-- 搜索建议列表 -->
    <view class="sugg-list">
      <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史 -->
    <view class="history-box">
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons @click="cleanHistory" type="trash" size="17"></uni-icons>
      </view>
      <view class="history-list">
        <uni-tag @click="gotoGoodsList(item)" :text="item" v-for="(item,i) in historys" :key="i"></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        keyword: '',
        searchResults: [],
        historyList: []
      };
    },
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('keyword') || '[]')
    },
    computed: {
      historys() {
        // 新建一个内存无关的数组
        return [...this.historyList].reverse()
      }
    },
    methods: {
      input(e) {
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.keyword = e.value
          this.getSearchList()
        }, 500)
      },
      async getSearchList() {
        if (this.keyword === '') {
          this.searchResults = []
          return
        }
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/goods/qsearch', {
          query: this.keyword
        })
        if (res.meta.status !== 200) return uni.$showMsg()
        this.searchResults = res.message
        this.saveSearchHistory()
      },
      saveSearchHistory() {
        const set = new Set(this.historyList)
        set.delete(this.keyword)
        set.add(this.keyword)
        this.historyList = Array.from(set)
        // 持久化存储
        uni.setStorageSync('keyword',JSON.stringify(this.historyList))
      },
      gotoDetail(id) {
        uni.navigateTo({
          url: '/subpackage/goods_detail/goods_detail?goods_id=' + id
        })
      },
      cleanHistory() {
        this.historyList = []
        uni.setStorageSync('keyword','[]')
      },
      gotoGoodsList(kw) {
        uni.navigateTo({
          url: '/subpackage/goods_list/goods_list?query=' + kw
        })
      }
    }
  }
</script>

<style lang="scss">
  .sugg-list {
    padding: 0 5px;
    .sugg-item {
      font-size: 12px;
      padding: 13px 0;
      border-bottom: 1px solid #efefef;
      display: flex;
      align-items: center;
      justify-content: space-between;
      .goods-name {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-right: 3px;
      }
    }
  }
  .history-box {
    padding: 0 5px;
    .history-title {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 40px;
      font-size: 13px;
      border-bottom: 1px solid #efefef;
    }
    .history-list {
      display: flex;
      flex-wrap: wrap;
      .uni-tag {
        margin-top: 5px;
        margin-right: 5px;
      }
    }
  }
</style>

